[ts-7000] interfacing TTL device with 7400

[Colin Copeland <>]

Hey guys,

I have a TS-7400 and a device that has a 0-5 volt TTL Square-Wave  
output that I plan to interface with. The 7400 has LVCMOS level GPIO  
ports. Does anyone have any recommendations for using a TTL-level  
pulse device with the GPIO ports? Should I use a few resisters to  
drop the voltage down to 3.3V for LVCMOS? Or should I use something  
like a LVC245 buffer?

Thanks,
   Colin Copeland



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